In the follow-up to entering the Form 1099-R, make sure that you indicate that the distribution was NOT from a Roth IRA. For a code 2B Form 1099-R indicating that the distribution was from a Designated Roth Account in a qualified retirement plan like a 401(k), TurboTax needlessly asks if the distribution was from Roth IRA. If you answer Yes, which is ALWAYS the incorrect answer for a code 2B Form 1099-R, you'll end up with TurboTax flagging your entry as erroneous.
